December 8th is the solemnity of the Immaculate Conception.It celebrates an important point of Catholic teaching, and in most years it is a holy day of obligation.Here are 8 things you need to know about the teaching and the way we celebrate it. 1. Who does the Immaculate Conception refer to? There’s a popular idea that it refers to Jesus’ conception by the Virgin Mary.It doesn’t.Instead, it refers to the special way in which the Virgin Mary herself was conceived.This conception was not virginal. (That is, she had a human father as well as a human mother.) But it was special...